[SteveThackery]

This is a quick way to check speedo accuracy, or use your tach as a speedo like I do.
After you get used to it, you can do it quickly in your head.

Do we know how accurate the tacho is, by the way?  If it's an analogue gauge it could be as inaccurate as the speedo.

[ace.cafe]

Do we know how accurate the tacho is, by the way?  If it's an analogue gauge it could be as inaccurate as the speedo.

We don't know.
 

BTW, digital gauges are capable of any amount of inaccuracy too. If you set your digital clock wrong, it will be just as wrong as an analog clock which is set wrong.
In fact digital is inherently less accurate than analog, because it attempts to simulate analog with a sampled representation. This automatically requires error correction equations to compensate for the blanks between samples.
The sampling rates can be increased to improve resolution until it is finally realized that the "ultimate" digital sampling rate would have an infinite sampling rate, which in other words would BE analog.
The advantage of digital is that it easily conforms to computer processing. NOT because it is any more accurate. There is no sampling rate limitation in analog.
 

Sorry for the digression. It's just one of my sensitive points.
 

[medra42]

There is no sampling rate limitation in analog.
 

Sorry for the digression. It's just one of my sensitive points.
 

Let's get crazy for a moment.

I assert that analog is subject to sampling rate limitations.

Let's imagine that the gauge is powered by a set of gears, which are turned by a flexible cable running from a separate set of gears. The sampling rate limitation in this case is based on the rotation that converted movement can measure. Sure, we know from geometry that we can have confidence in the converted movement and the display on the dial. On the other hand, it can only measure and display that which it was designed to measure. You necessarily lose information because gears don't fit together perfectly and because the display can only show certain levels of info. Everything else is ignored.

The question is: is the digital representation an improvement over the analog system? As Ace pointed out, people often assume that it is without any real proof.

[KD5ITM]

Has anybody Center gauges to be recalibrated? I'm strongly thinking about taking the gauges and sending them to the company that recalibrated the gauges in my 79 Hurst/Olds. My tachometer shows to be very close to what the PCV software shows.

[mevocgt]

To Ace's question, I have a taller front sprocket(1 tooth) on my bike.  My bike tops out at an indicated 145 kph with me on it.  My mechanic took it out and pinned the speedo( @ 150 kph).  He is 100lbs lighter than me, and several inches shorter for a better tuck.  The bike also has a bug screen on it.  I repeat, these are indicated speeds...

[Otto_Ing]

Mine feels lame once the tacho crosses 120km/h. Highest i did so far was 130km/h...I did not feel any acceleration at all beyond that Point which was about 120 km/h GPS meassured. Stock gearing.

[SSdriver]

What is the actual top speed that anyone has actually attained on this bike?
Not optimistic, but real

Ace...I have done an indicated 90 a couple of times(which was probably closer to 85?). I didn't check the RPM.
Also, I was not down on the tank which might have squeezed a tad more out of her. Or squeezed a tad bit out of me since I don't really like going that fast in my old age
...Jimmy

[suitcasejefferson]

I have not read this whole thread, so I may have missed something important. But my 2013 B5 is well worn in with 5500 miles, and I still won't ride it over 60 miles per hour. I want it to last. The longer it lasts, the more enjoyment I will get out of it. I have had it up to 70 mph briefly, and it sounds like it is about to fly apart. That may very well not be the case, but I don't like it at that speed. The UCE is a better engine in every way than the iron barrel (other than to me it is not as cool) but it has a long way to go to meet Japanese standards.

I put over 20,000 freeway miles on a 234cc Honda Rebel, at full throttle, and it didn't cause any problems. I heard from someone who knows that the Rebel engine, which is an ancient '70s design, will run over 80,000 miles at full throttle before it begins to eat it's valves. But, it is a small twin, with low reciprocating mass, designed to run at high speeds.

[pornoheft]

Hi all,
My trip will be tomorrow and I just did the calculations. We would cover at least 1000km (621 miles) in a space of 4 days, mainly the first and last day having the most mileage of 400km (248 miles) for going to and fro. Currently fitted with Motad exhaust and header and K&N filter from Hitchcocks. Bike serviced with 10w50 full synthetic engine oil (Chex 9000. I don't see that on any website but apparently its based in Germany) a couple of days ago and I am super excited. Not to mention my shop managed to fix that vibrating speedometer when you go above 2.5-3k RPM.

Wish me luck and hope the journey will be smooth. I'll update you guys on any findings. We would be going an average of 70mph for an hour+ straight.

[KD5ITM]

 Good luck. Tomorrow is my first long road trip. Nowhere near as long as yours lol. Only 75 miles for me in the morning.

[Farmer_John]

Good luck. Tomorrow is my first long road trip. Nowhere near as long as yours lol. Only 75 miles for me in the morning.

That's a sprint!  Hell, I did 150 on the day I had my 300 mile service done!

[pornoheft]

Good luck. Tomorrow is my first long road trip. Nowhere near as long as yours lol. Only 75 miles for me in the morning.

Should be a fun sprint. Ride safe! Also, what are your inputs for fixing a helmet camera? Topic is open for all.

[KD5ITM]

Heck, I had to take a day of vacation from work just to go 75  miles  and did I say I was doing it today? Oops, its tomorrow lol

[pornoheft]

Well, i'm currently on the 330 mark while my friend is sending his bike for an oil change. The ride has been pretty smooth, if you're used to the vibration. Surprisingly, I could catch up to their spurts of sprints. Even managed to do the ton at one point, which made me feel happy and scared. Bike is pretty stable and able to maintain a consistent speed of 75 mph. I just wished I got a video of when my bike hit the big 100.

[Otto_Ing]

Ton? Downhill with strong back wind? ...or did you do some performance mods to the bike?